Primary beam means radiation which passes through an aperture of the source housing by a direct path from the x-ray tube or a radioactive source located in the radiation source housing.
Primary Source means the Screen Page specified as such in the applicable Pricing Supplement and (in the case of any Screen Page provided by any information service other than the Reuters Monitor Money Rates Service (“Reuters”)) agreed to by the Agent Bank;
Primary dose monitoring system means a system which will monitor the useful beam during irradiation and which will terminate irradiation when a pre-selected number of dose monitor units have been delivered.
Primary Listing means the single White Pages directory listing for residence and business Customers provided by CBT, and the basic Yellow Pages directory listing provided for business Customers by Publisher. Each telephone configuration that allows a terminating call to ▇▇▇▇ for an available line among a series of lines shall be considered a single Customer entitled to a single primary listing.
primary carer means the person who has responsibility for the care of the Child. Only one person can be the Child’s Primary Carer on a particular day.